Employee Benefit Plans (Tables) (Defined Benefit Pension)

6 Months Ended

Jun. 30, 2012

Defined Benefit Pension

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs

For the three and six month periods ended June 30, 2012 and 2011 the components of pension expense are as follows:

	Three Months Ended June 30						Six months ended June 30,
	2012			2011			2012			2011
Service cost	$	3,548		$	4,062		$	6,375		$	6,633
Interest cost	5,646			7,398			10,142			11,905
Expected return on assets	(6,755		)	(8,422		)	(12,134		)	(14,353		)
Amortization of prior service cost	52			66			105			105
Amortization of net actuarial loss	2,738			1,582			5,475			3,191
Total pension expense	$	5,229		$	4,686		$	9,963		$	7,481